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LHS 2090 is a red dwarf star of spectral type M6.5V, located in constellation Cancer at 20.8 light-years from Earth.[10]

LHS 2090
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cancer
Right ascension 09h 00m 23.594s[1]
Declination +21° 50′ 05.43″[1]
Apparent magnitude (V) 16.11[2]
Characteristics
Evolutionary stage Main-sequence star[2]
Spectral type M6.5 V[3]
Apparent magnitude (J) 9.44[2]
Astrometry
Radial velocity (Rv)23.3[2] km/s
Proper motion (μ) RA: -514.942 mas/yr[4]
Dec.: -592.253 mas/yr[4]
Parallax (π)157.2686 ± 0.0535 mas[4]
Distance20.739 ± 0.007 ly
(6.359 ± 0.002 pc)
Details
Mass0.09[5] M☉
Radius0.12[6] R☉
Luminosity0.00082[7] L☉
Temperature2680±24[7] K
Metallicity [Fe/H]-0.06±0.17[8] dex
Rotation0.439 d[6]
Rotational velocity (v sin i)15.0±1.0[6] km/s
Other designations
Gaia DR2 685103912857072640, LHS 2090, LP 368-128, NLTT 20726, 2MASS J09002359+2150054[9]
Database references
SIMBADdata
LHS 2090
Location of LHS 2090 in the constellation Cancer

The star was identified to be a red dwarf at short distance (6 parsecs from Sun) in 2001.[11] As typical for very cool red dwarfs, its spectrum is dominated by molecular water absorption. Stellar metallicity is similar to that of Sun`s.[8]

Radial velocity measurements did not yield any detection of stellar companion or giant planet on orbit around LHS 2090, as in 2018.[2]


References


  1. Cutri, R. M.; et al. (2003). "2MASS All-Sky Catalog of Point Sources". VizieR On-line Data Catalog. Bibcode:2003yCat.2246....0C.
  2. The Solar Neighborhood XLIV: RECONS Discoveries within 10 Parsecs, 2018, arXiv:1804.07377
  3. Alonso-Floriano, F. J.; Morales, J. C.; Caballero, J. A.; Montes, D.; Klutsch, A.; Mundt, R.; Cortés-Contreras, M.; Ribas, I.; Reiners, Ansgar; Amado, P. J.; Quirrenbach, A.; Jeffers, S. V. (2015). "CARMENES input catalogue of M dwarfs" (PDF). Astronomy & Astrophysics. 577: A128. arXiv:1502.07580. doi:10.1051/0004-6361/201525803. S2CID 53135130.
  4. Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  5. A 3D search for companions to 12 nearby M dwarfs, 2015, arXiv:1501.05012
  6. Fouqué, Pascal; et al. (April 2018), "SPIRou Input Catalogue: global properties of 440 M dwarfs observed with ESPaDOnS at CFHT", Monthly Notices of the Royal Astronomical Society, 475 (2): 1960–1986, arXiv:1712.04490, Bibcode:2018MNRAS.475.1960F, doi:10.1093/mnras/stx3246.
  7. The solar neighborhood. XXXII. The hydrogen burning limit, 2013, arXiv:1312.1736
  8. Metallicity and temperature indicators in M dwarf K-band spectra: testing new and updated calibrations with observations of 133 solar neighborhood M dwarfs, 2011, arXiv:1112.4567
  9. "LHS 2090". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 January 2018.
  10. Henry, T. J.; Jao, Wei-Chun; Subasavage, John P.; Beaulieu, Thomas D.; Ianna, Philip A.; Costa, Edgardo; Méndez, René A. (2006). "The Solar Neighborhood. XVII. Parallax Results from the CTIOPI 0.9 m Program: 20 New Members of the RECONS 10 Parsec Sample" (PDF). The Astronomical Journal. 132 (6): 2360–2371. arXiv:astro-ph/0608230. Bibcode:2006AJ....132.2360H. doi:10.1086/508233.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  11. Search for nearby stars among proper motion stars selected by optical-to-infrared photometry I. Discovery of LHS 2090 at spectroscopic distance of d ∼ 6 pc, 2001, arXiv:astro-ph/0106222

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LHS 2090 — звезда, которая находится в созвездии Рак на расстоянии приблизительно 20,7 светового года от нас[10]. Это одна из ближайших к нам звёзд.


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